Dual-band Fiber Transmission Endoscope Lens Optical System

Abstract

The invention provides a dual-waveband optical fiber transmission optical system of an endoscope lens. Four groups of five optical lenses are arrayed, wherein the first group is a negative meniscus lens with a concave surface on the left side, the second group is a biconvex lens of which a convex lens with a smaller curvature absolute value is on the left side, the third group is a cemented lens group cemented by a convex lens and a concave lens, and the fourth group is a plane convex lens with a convex surface on the left side. In the third group, the convex lens with the smaller curvature absolute value is on the left side, and the concave lens with the smaller curvature absolute value is on the left side. The dual-waveband optical transmission optical system of the endoscope lens has higher light collecting capability and allows the lens to obtain sharp images in a darker environment.

Description

technical field [0001] The invention relates to a dual-band optical fiber transmission endoscope lens optical system, which can be applied to industries such as industry, security protection, and medical treatment, and is used for observing the fine structure inside an object. Background technique [0002] The main problems of the current speculum lens: (1) The relative aperture is small, the light-gathering ability is weak, and it is impossible to obtain a clear image in a dark environment; (2) It can only be used in the visible band, and cannot achieve near-infrared band observation; (3) Large volume, difficult to apply in space-constrained conditions. The above-mentioned problems of the speculum lens cannot meet the needs of observing the internal fine structure of objects in industries such as industry, security, and medical treatment. In order to meet the above requirements, it is necessary to provide a sight glass lens with a small size, a large numerical aperture, an...

AI Technical Summary

Problems solved by technology

[0002] The main problems of the current speculum lens: (1) The relative aperture is small, the light-gathering ability is weak, and it is impossible to obtain a clear image in a dark environment; (2) It can only be used in the visible band, and cannot achieve near-infrared band observation; (3) Large size, difficult to apply in space-constrained conditions

The above-mentioned problems of the speculum lens cannot meet the needs of observing the internal fine structure of objects in industries such as industry, security, and medical treatment.

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